Header And Logo
|
#include "postgres.h"#include "access/gin.h"#include "access/gist.h"#include "access/skey.h"#include "_int.h"
Go to the source code of this file.
Functions | |
| PG_FUNCTION_INFO_V1 (ginint4_queryextract) | |
| Datum | ginint4_queryextract (PG_FUNCTION_ARGS) |
| PG_FUNCTION_INFO_V1 (ginint4_consistent) | |
| Datum | ginint4_consistent (PG_FUNCTION_ARGS) |
| Datum ginint4_consistent | ( | PG_FUNCTION_ARGS | ) |
Definition at line 114 of file _int_gin.c.
References BooleanSearchStrategy, elog, ERROR, gin_bool_consistent(), i, PG_GETARG_INT32, PG_GETARG_POINTER, PG_GETARG_QUERYTYPE_P, PG_GETARG_UINT16, PG_RETURN_BOOL, RTContainedByStrategyNumber, RTContainsStrategyNumber, RTOldContainedByStrategyNumber, RTOldContainsStrategyNumber, RTOverlapStrategyNumber, and RTSameStrategyNumber.
{
bool *check = (bool *) PG_GETARG_POINTER(0);
StrategyNumber strategy = PG_GETARG_UINT16(1);
int32 nkeys = PG_GETARG_INT32(3);
/* Pointer *extra_data = (Pointer *) PG_GETARG_POINTER(4); */
bool *recheck = (bool *) PG_GETARG_POINTER(5);
bool res = FALSE;
int32 i;
switch (strategy)
{
case RTOverlapStrategyNumber:
/* result is not lossy */
*recheck = false;
/* at least one element in check[] is true, so result = true */
res = TRUE;
break;
case RTContainedByStrategyNumber:
case RTOldContainedByStrategyNumber:
/* we will need recheck */
*recheck = true;
/* at least one element in check[] is true, so result = true */
res = TRUE;
break;
case RTSameStrategyNumber:
/* we will need recheck */
*recheck = true;
/* Must have all elements in check[] true */
res = TRUE;
for (i = 0; i < nkeys; i++)
{
if (!check[i])
{
res = FALSE;
break;
}
}
break;
case RTContainsStrategyNumber:
case RTOldContainsStrategyNumber:
/* result is not lossy */
*recheck = false;
/* Must have all elements in check[] true */
res = TRUE;
for (i = 0; i < nkeys; i++)
{
if (!check[i])
{
res = FALSE;
break;
}
}
break;
case BooleanSearchStrategy:
{
QUERYTYPE *query = PG_GETARG_QUERYTYPE_P(2);
/* result is not lossy */
*recheck = false;
res = gin_bool_consistent(query, check);
}
break;
default:
elog(ERROR, "ginint4_consistent: unknown strategy number: %d",
strategy);
}
PG_RETURN_BOOL(res);
}
| Datum ginint4_queryextract | ( | PG_FUNCTION_ARGS | ) |
Definition at line 16 of file _int_gin.c.
References ARRNELEMS, ARRPTR, BooleanSearchStrategy, CHECKARRVALID, elog, ERROR, GETQUERY, i, Int32GetDatum, NULL, palloc(), PG_GETARG_ARRAYTYPE_P, PG_GETARG_POINTER, PG_GETARG_QUERYTYPE_P, PG_GETARG_UINT16, PG_RETURN_POINTER, query_has_required_values(), RTContainedByStrategyNumber, RTContainsStrategyNumber, RTOldContainedByStrategyNumber, RTOldContainsStrategyNumber, RTOverlapStrategyNumber, RTSameStrategyNumber, QUERYTYPE::size, NODE::type, val, and VAL.
{
int32 *nentries = (int32 *) PG_GETARG_POINTER(1);
StrategyNumber strategy = PG_GETARG_UINT16(2);
int32 *searchMode = (int32 *) PG_GETARG_POINTER(6);
Datum *res = NULL;
*nentries = 0;
if (strategy == BooleanSearchStrategy)
{
QUERYTYPE *query = PG_GETARG_QUERYTYPE_P(0);
ITEM *items = GETQUERY(query);
int i;
/* empty query must fail */
if (query->size <= 0)
PG_RETURN_POINTER(NULL);
/*
* If the query doesn't have any required primitive values (for
* instance, it's something like '! 42'), we have to do a full index
* scan.
*/
if (query_has_required_values(query))
*searchMode = GIN_SEARCH_MODE_DEFAULT;
else
*searchMode = GIN_SEARCH_MODE_ALL;
/*
* Extract all the VAL items as things we want GIN to check for.
*/
res = (Datum *) palloc(sizeof(Datum) * query->size);
*nentries = 0;
for (i = 0; i < query->size; i++)
{
if (items[i].type == VAL)
{
res[*nentries] = Int32GetDatum(items[i].val);
(*nentries)++;
}
}
}
else
{
ArrayType *query = PG_GETARG_ARRAYTYPE_P(0);
CHECKARRVALID(query);
*nentries = ARRNELEMS(query);
if (*nentries > 0)
{
int32 *arr;
int32 i;
res = (Datum *) palloc(sizeof(Datum) * (*nentries));
arr = ARRPTR(query);
for (i = 0; i < *nentries; i++)
res[i] = Int32GetDatum(arr[i]);
}
switch (strategy)
{
case RTOverlapStrategyNumber:
*searchMode = GIN_SEARCH_MODE_DEFAULT;
break;
case RTContainedByStrategyNumber:
case RTOldContainedByStrategyNumber:
/* empty set is contained in everything */
*searchMode = GIN_SEARCH_MODE_INCLUDE_EMPTY;
break;
case RTSameStrategyNumber:
if (*nentries > 0)
*searchMode = GIN_SEARCH_MODE_DEFAULT;
else
*searchMode = GIN_SEARCH_MODE_INCLUDE_EMPTY;
break;
case RTContainsStrategyNumber:
case RTOldContainsStrategyNumber:
if (*nentries > 0)
*searchMode = GIN_SEARCH_MODE_DEFAULT;
else /* everything contains the empty set */
*searchMode = GIN_SEARCH_MODE_ALL;
break;
default:
elog(ERROR, "ginint4_queryextract: unknown strategy number: %d",
strategy);
}
}
PG_RETURN_POINTER(res);
}
| PG_FUNCTION_INFO_V1 | ( | ginint4_consistent | ) |
| PG_FUNCTION_INFO_V1 | ( | ginint4_queryextract | ) |
1.7.1